题目内容

一场大雪后，人们会感到外面万籁俱静，究其原因，你认为正确的是:
A．大雪后，行驶的车辆减少，噪声减小；B．大雪蓬松多孔，对噪声有吸收作用；
C．大雪后，大地银装素裹，噪声被反射；D．大雪后气温较低，噪声传播速度变慢；
B解析:
略
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一场大雪后，人们会感到外面万籁俱静，究其原因，你认为正确的是:
A．大雪后，行驶的车辆减少，噪声减小；B．大雪蓬松多孔，对噪声有吸收作用；
C．大雪后，大地银装素裹，噪声被反射；D．大雪后气温较低，噪声传播速度变慢；
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